Author Topic: 500mm mirror lens (Read 2140 times)

Dop · « **on:** September 12, 2009, 09:52:15 AM »

Ok, so this is ridiculous. A 500mm mirror lens, T-Mount to OM adaptor, then MF-2 OM to MFT adaptor.

full-size original: I wish I was the moon tonight

It's the best picture of the moon I've ever taken. It's NOT cropped (except 4:3 to 3:2).

Next full moon, clear skies permitting, I'll try again, but use the anti-shock feature to give the camera time to settle between pressing the shutter release and actually taking the picture. The 2 second self time wasn't quite enough.

500mm = 1000mm with the 2x crop factor. I've got a 2x teleconverter I could use on this, to get a 2000mm equivalent.

cosinaphile · « **Reply #1 on:** September 17, 2009, 03:43:06 PM »

an excellent shot of the moon , can you give exposure info?

also you should post this in ep-1 user pics , but use a file that is up to i think 5 mb so it can be looked at enlarged , thanks

bodog · « **Reply #2 on:** September 18, 2009, 10:59:57 AM »

Nice pic. I have a Sigma 600mm for the Canon EF mount. Can't wait to try it, along with the Zenitar fish eye. Just have to wait until the adapter prices come down...

voyager · « **Reply #3 on:** September 18, 2009, 11:24:32 PM »

Wow, talk about zoom!

Dop · « **Reply #4 on:** September 20, 2009, 02:15:07 AM »

Cosinaphile asked for exposure info:
The lens is f8 fixed, ISO was 200, shutter speed was 1/320th of a second. I used spot metering to ensure the exposure was taken off the moon's surface only.

ChrisJ · « **Reply #5 on:** September 20, 2009, 02:52:06 PM »

I got this shot with my Astro Scope with my G1 at prime focus.

The focal length is 650mm @ f4, by using the lens cover you can bring this down to f8 which is what I did here. No crop strait from camera.

If I fit a lens and let it project it's image onto the camera sensor you get a more magnified view as here

This is with a 24mm eyepiece, again no crop, a shorter focal length eyepiece would give even more magnification.

Chris

cosinaphile · « **Reply #6 on:** September 21, 2009, 03:34:27 PM »

thanks for the exposure info , i find astro-photography facinating ,. the surface of the moon is awe inspiring..... billions of years of impact history! whoa!

500mm mirror lens